MARS 32621 Crankcase Heater 320788-702 and S3 (or +

and S3 (or +

For hot water (hydronic) systems

With a 1/2 PSI maximum pressure rating and electrical compatibility ranging from 120V to 277VAC

including fan timing

always verify your fan motor's specs against the original nameplate

MARS 32621 Crankcase Heater 320788-702 and S3 (or +Experienced HVAC contractors understand that protecting the compressor from liquid slugging is non negotiable. The MARS 32621 Crankcase Heater is a heavy duty, 240V 50W belt style heater engineered to maintain optimal lubricant temperature during the off cycle. By keeping the crankcase oil warmer than the rest of the system, this belly band heater effectively prevents refrigerant migration, ensuring that the compressor startup is smooth and the